| 1 | RPA | Provence Aero Service | Callsign: Airpass, | F | AVCODES |
| 2 | RPA | Republic Airline, Inc. | IATA: RW, Callsign: Brickyard, Designator RW* recalled by IATA | USA | AVCODES |
| 3 | RPA | Republic Airline, Inc. | Callsign: Brickyard, Designator RW* recalled by IATA | USA | AVCODES |
| 4 | RPA | Republic Airline, Inc. | IATA: YX, Callsign: Brickyard, IATA Prefix: 453, Designator RW* recalled by IATA | USA | AVCODES |
| 5 | RPA | Republic Airlines | IATA: RW | | ICAO1 |
| 6 | RPAC | R PACKING INC | | | SCAC3 |
| 7 | RPAC | RAVENSTAR PACIFIC SHIPPING INC | | | SCAC4 |
| 8 | RPAH | RANKIN, PAUL TRUCKING | | | SCAC4 |
| 9 | RPAR | RAMPART RENTALS INC | | | SCAC3 |
| 10 | RPAS | ROYS POOLS AND SPAS | | | SCAC4 |
| 11 | RPAT | R & P AUTOMOTIVE (TRANSPORT DIV) | | | SCAC4 |
| 12 | RPAX | Rhone-Poulenc Basic Chemicals Co. | eliminated 10/1992; 1/1994 (not listed) | | NAKINA |
| 13 | RPAX | Rhone-Poulenc Basic Chemicals Co. | eliminated 10/92; 1/94 | | NRHS |
| 14 | RPAX | RHODIA, INC. [(RPBX) RHONE-POULENC BASIC CHEMICALS COMPANY] | | | PWRC |
| 15 | RPAZ | RAILROAD PROPERTIES ASSOCIATES | | | PWRC |
